Bed-movement for printing-presses.



N0. 725,7i4. 1 PATENTED APR. 21, 1908. N

' W. S. HUSON.

BED MOVEMENT FOR PRINTING PRESSES.

APPLICATION rum) my 12, 1902.

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25,7 4 v 'PATENTED APR. 21, 1903.

W. s. HUSON.

BED MOVEMENT FOR PRINTING PRESSES.

APPLICATION FILED MAY 12, 1902 no MODEL. v a sums-sum 2.

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No. 725,714. PATENTED A'PR. 21,1903.

w. s. HUSON. BED MOVEMENT FOR PRINTING PRESSBS.

APPLICATION FILED MAY 12. 1902. I0 IODBL. I 3 SHEETS-4113B! 3.

Urrnn STATES WINFIELD HUSON, OF DERBY, CONNECTICUT, ASSIGNOR TO THEW'HITLOCK PRINTING PRESS MFG. C O., OF DERBY, CONNECTICUT,

A CORPORATION.

BED-MOVEMENT FOR PRINTING-PR ESSES.

SPECIFICATION forming part of Letters Patent 725i,714, dated April 211903. 2

Application filed May 12, 1902. Serial No.106.993. (N0 model.) i

To all whom it may concern.-

Be it known that I, WINFIELD S. HUsON, of Derby, in the county of NewHaven and State of Connecticut, have invented a new and usefulImprovement in Bed-Movements for Printing-Presses; and I do herebydeclare the following, when taken in connection with the accompanyingdrawings and the figures of reference marked thereon, to be a full,clear, and exact description of the same, and which said drawingsconstitute part of this specification, and represent, in

Figure 1, a plan view of one form which my improved bed-movement forprintingpresses may assume; Fig. 2, an enlarged broken View designedinparticular to show the converter-sector and its immediately-relatedparts; Fig. 3, a'view-of the machine,

partly in side elevation and partly in vertical 1 section; Fig. 4, abroken detail view'on the line ct b of Fig. 3 and showing the auxiliarytrain for assisting the sun-andv-planet-gear' reversing; Fig. 7, adetail broken view of one period of printing and for differentiatingthe' speed of the bed at the ends of its stroke as required for thereversal of its motion.

With these ends in'view my invention consists in a bed-movement forprinting-presses having certain details of construction and combinationsof parts, as will be hereinafter described, and pointed out in theclaims.

In carrying out my invention as herein shown theimpression cylinder 2 isdriven at a uniform speed from the main driving-shaft 3 of the press bymeans of a train of gears comprising a main driving-pinion 4, mounted onthe said shaft, an intermediate gear 5, into whichthe said pinionmeshes, and a gear 6, mounted upon'the shaft 2 ofthe said cylinder 2'andmeshed into by the said intermediate gear 5. The reciprocatingtype-.loed 7 is also driven from the main driving-shaft 3, them'ain'driving-pinion 4 aforesaid meshing into the said intermediate gear5, which meshes into a gear-wheel 8, mounted upon a driven shaft'9,carrying at its inner end a bevel-pinion 10, which meshes into a heavy:bevel-ge'ar 11, mounted vertically in a bushing 12, carried by thecentral girder 13 of the press. In' Order to reinforce the said centralgirder 13, I employ a cross-girder 14, extending under it at aright-angle and supported at its ends in the side frames 15 of thepress. The girderl4 also carries a bracket 16, supporting the inner endof the said shaft 9.

Upon the bevel-gear 11 and eccentric to the centerthereof I mount aplanet-gear 17, which meshes into an internally-toothed fixed ring 18 oftwice its diameter, constituting the sun-gear of a sun-and-planet-geartrain, and bolted to a suitable skeleton frame 19,

forming a part of the frame of the press.

verter-sector 22 in the form of a bellcrank lever, one arm of which isprovided with a segmental rack 23, meshing into a straight rack 24,mounted in the adjacent end of the carriage or truck 25, the oppositeend of into a fixed rack 27, located below it and supported in the frameof the press. The traversing or railway gear 26 also meshes into a rack28, secured to the lower face of the reciprocating type bed 7, whichtherefore part-akes of the motion of the said carriage. As the planetgear 17 is just half the diameter of the sun-gear 18, the crank -pinwill move back and forth in a straight line and would,

except as hereinafter provided for, move the carriage back and forth ina straight line at a rate of speed corresponding to the speed of thecrank-pin, which varies in speed in different portions of its strokeafter the manner of all crank-motions. In order, however, to modify thismotion, which would otherwise be transmitted to the type-bed, andtosecure therefor throughout the major portion of its stroke a rate ofmotion exactly conforming to the speed of the surface of the cylinder 2during the period of printing, I locate upon the other arm of theconverter-sector 22 an antifriction roller 29, which travels inv adoubly-curved cam-like path or cam 30,formed to receive it in aconverter 31 in the form'of a plate, which is bolted to the-troughmembers 32 of the press-frame, the said trough members being formed withthe usual troughs receiving antifriction-rollers 34, upon which thereciprocating type-bed 7 rests.

The said antifriction-roller 29 moves back and forth in the said path 30and causes the sector 22 to oscillate upon the crank-pin 21 as uponacenter and impart what I may term a secondary or differential movementto the carriage 25, which on this account will have its movementmodified and transformed from a pure crank-movement into a movement ofequalized speed during the major portion of its stroke and ofdifferential speed at the ends of its stroke. It follows from theforegoing that the curvature of the path 30 will determine the degree ofoscillation of the converter-sector, and therefore the differentialmovement of the type-bed. Therefore in designing the press the speed ofthemajor portion of the movement of the type-bed will be made tocorrespond to the speed of the cylinder, and the stopping and startingor reversing speed of the type-bed at the ends of its stroke will bedetermined with refer- I once to the rate at which the type-bed is to bereversed, due. The curve of the path 30 will be laid out accordingly.

To illustrate the movement of the cylinder 2 and the type-bed 7, I haveintroduced a pression-cylinder moves, to slow it down from the point a,to the point a Where it comes to a stop, to start it up and move it fromthe point a? to the point a, to slow it down from the point a to thepoint a Where it comes to a stop, and to start it up and move it fromthe point a to the point a. It will thus be seen that the movement ofthe type-bed may be divided into three phases--viz., a central or majoror printing movement and two end movements, which are utilized inbringing the bed to a stop and reversing it at each end of its stroke.It will be understood that the movement of the bed between the points aand a, and a and a in either direction will never be faster than themovement of the bed between the points a, and a in either direction. Bydifierentiating the movement of the bed as described in difierentportions of its stroke, so as to give it, as it were, a long rapiduniform printing stroke and short reversing strokes, I am enabledtooperate the bed at a higher speed than I otherwise could.- The end.strokes of the bed are, in eflect, crankmotion strokes, while thecentral portion of the stroke of the bed is a crank-motion strokemodified or transformed into a stroke of uniform speed throughout itsentire length.

As herein shown, I have provided the press with auxiliary mechanism forassisting'the sun-and-planet-gear train in driving the typebed duringthe operation of printing. This auxiliary mechanism is not essential tomy improved press, though I prefer to employ it, nor is such auxiliarymechanism limited to use with the sun-and-planet-gear train abovedescribed, as it may be used in other situations.' It comprises asupplemental rack 35, fixed to the lower face of the type-bed 7 inposition to be engaged by a vertically-movable gear-wheel 36, mounted ina bell-oranklike fork 37, having the ends of the two members of itsshort arm swiveled upon a bracket 38, through which the maindriving-shaft 3 passes, so that the said fork 37 will swing on a centerconcentric with the said shaft. The long arm of the fork 37 extendsdownwardly and carries an antifriction roller 39, coacting with a cam40, mounted upon a cam -shaft 41, which is driven from the maindriving-shaft 3, so as to revolve the cam once for every completemovement back and forth of the type-bed by means of a pinion 42, mountedon the said main drivingshaft 3 and meshing into a large intermediategear 43, carrying a pinion 44, which in turn meshes into a gear 45,mounted directly on the cam-shaft 41. The said cam 40 is shaped so thatit lifts the gear 36 into engagement with the rackv35 at the beginningof the printing movement of the type-bed and maintains it in suchengagement until such movement is completed, when the cam allows thegear to drop away from the rack 35 and remain in retirement until thebed starts upon its succeeding printing movement. It will be thereforeunderstood that the power transmitted to the IIO cylinder 2, to bringthe bed and cylinder into exact registration at the beginning of theprinting operation. These are well-known adjuncts of printingpresses anddo not need detailed description.

Instead of connecting the convertersector 22 with the truck or carriageby means-of the racks 23 and 24 I may, employ the modified constructionshown in Fig. 7, in which the bell-crank converter-sector 47 isconnected with a carriage or truck by means of a pitman 49, the pivotalconnection of which with the con verter-sector 47 permits the crankpin50 to be connected with the planet-gear at some other point than on thepitch-line thereof, in,which case the pinwill travel through aslightly-curved path instead of in a straight line. That movement of thepin,

however, will be compensated for by the pivotal connection between thelever 47 and the pitman 49 and could not be compensated for a shaft57,corresponding to the cam-shaft 41,

before mentioned. It will be understood-that the cam 56 is constructedand arranged so as to cut the wheel into operation at the beginning ofthe printing movement of the bed and to cut it out of operation at theconclusion of the printing movement of the bed.

In the modified construction shown by Fig. 9 the supplemental rack 35 isconstantly meshed into by a gear-wheel 58, turning idly upon a shaft 59and meshed into by a pinion 60, turning idly upon the main shaft 3 andprovided with'a clutch-head 61, which is engaged by a correspondingclutch-head 62, rotating with but splined upon the said main shaft 3 andcut into and out of action with the clutch-head 61 by means of a lever63, driven from a cam, (not shown,) butcorresponding to the cam 56,before mentioned. It will be understood that at the beginning of theprinting movement of the bed 7 the lever 63 moves the clutch-head 62into engagement with the clutch-head 61, whereby the power of the gear58, in mesh with the rack 35. At the conclusion of the printing movementof the bed the lever 63 again acts and this time to disconnect the head62 from the head 61, whereby the power of the shaft 3 is cut off fromthe pinion and the gear 58, which are thereafter moved idly by the rackof the typebed.

In view of the modifications shown and described and suggested and ofothers that may obviously be made I won id have it understood that I donot limit myself to the constructions shown and described, but holdmyself at liberty to make such departures therefrom as fairly fallwithin the spirit and scope of my invention.

Having fully described my invention,what I claim as new, and desire tosecure by Letters Patent, is

1. In a bed-movement for printing-presses, the combination with a bed,of a crank-pin moving in a reciprocating path, an oscillating convertingdevice applied directly to the said crank-pin with which it reciprocatesand on which it is oscillated, and connection between the saidconverting device and the type-bed, whereby the said device by itsoscillation on the said pin modifies the action thereof so as to movethe bed in the central portion of its throw at a rate uniform with themovement of the impression-cylinder and at a different rate at the endsof its throw.

2. In a bed-movement for printing-presses, the combination with a bed,of power connections for reciprocating the said bed including acrank-pin, a converting device applied di-' rectly to the said pin withwhich it reciprocates, and on which it is oscillated, connection betweenthe said converting device and the said bed, and a converter containingadoubly-curved path whicheffects the oscillation of the said device uponthe crank-pin,

whereby the movement of the pin is modified.

so that the bed will be moved in the central portion of its throw at arate uniform with the movement of the impression-cylinder, and at adifferent rate at the ends of its throw.

3. In a'bed-movement forprinting-presses, the'combination with abed, ofpower connections for reciprocating the said bed including a crank-pin,a converter-sector oscillating upon the said pin and having rackconnection with the bed, and a converter which 0scillates theconverter-sector to modify the motion derived by the bed from thecrankpiu so that the bed is moved'in the central portion of its throw ata rate uniform with the movement of an impression-cylinder, and at adifferent rate at the ends of its throw.

4. In a bed-movement for printing-presses, the combination with a bed,of a'carriage connected with the bed and provided with a rack, and powerconnections for reciprocating the said bed including a crank-pin, anoscillating converter-sector mounted upon the said pin and provided witha segmental rack meshing into the rack of the carriage, and a IIC tomodify the motion derived by the bed from the said pin. V

6. In a bed-movement for printing-presses, the combination with a bed,of power connections for reciprocating the said bed to move the same inthe central portion of its throw at a rate uniform with the movement ofan impression-cylinderand at a differentiated rate at the ends of itsthrow, and a supplemental bed-driving mechanism including a rack carriedby the bed, agear arranged independently of the impression-cylinder forcoaction with the said rack, and means for cutting the said gear intooperation at the beginning of the printing movement of the bed vandcutting it out of operationat the conclusion of the printing movement ofthe bed.

7. In a bed-movement for printing-presses, the combinationwith abed, ofpower connections for moving the said bed in the central portion of itsthrow at a rate uniform with the movement of an impression-cylinder, andat a different rate at the ends of its throw, asupplemental bed-drivingmechanism operating to assist the movement of the bed during the centralportion of its throw V and including a rack applied to the lower face ofthe bed, and power connections lead ing to the said rack from ghedriving-shaft of the machine. p Q

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WINFIELD S. HUSON.

\Vitnesses: v

GEORGE D. SEYMO R, FREDERIC O. EARLE.

